Under the hood
Useful2 Signal1
If the cleanup marker file is a directory or symlink loop, it's deleted and rebuilt.
What's wrong with this entry?
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What
Before trusting the .last-cleanup marker that rate-limits cleanup runs, the code inspects it. If the check fails with a symlink loop, directory or device-node error, it records a telemetry event with the error code and verdict, deletes the marker, and logs whether removal succeeded. A separate pass deletes stale files matching a fixed list of cleanup marker names.
Evidence
tengu_cleanup_throttle_marker
Strings lifted out of the shipped bundle, so the claim above can be checked against them.